The BBC's Gordon Corera reveals the untold story of how forty years ago the
US abandoned a nuclear bomb below the ice in Greenland.
The US government were constantly flying nuclear-armed B-52 bombers over Greenland during the 1960s, the BBC has discovered in a recent investigation. The operation, called Chrome Dome, was designed to instantly respond to the Soviet Union if the latter launched a nuclear missile attack against Thule, a US Air Force base strategically placed near the North Pole. The Pentagon believed that this could potentially start a full-scale thermonuclear war, so they kept the birds in the sky at all times as a deterrent against Moscow. It was a "good" plan, until one of them crashed on January 21 1968.